package org.bouncycastle.jce;

import java.util.Enumeration;

import org.bouncycastle.asn1.x9.X962NamedCurves;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.jce.spec.ECNamedCurveParameterSpec;

/**
 * a table of locally supported named curves.
 */
public class ECNamedCurveTable {
    /**
     * return a parameter spec representing the passed in named curve. The routine returns null if the curve is not present.
     * 
     * @param name
     *            the name of the curve requested
     * @return a parameter spec for the curve, null if it is not available.
     */
    public static ECNamedCurveParameterSpec getParameterSpec(String name) {
        X9ECParameters ecP = X962NamedCurves.getByName(name);
        if (ecP == null) {
            return null;
        }

        return new ECNamedCurveParameterSpec(name, ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed());

    }

    /**
     * return an enumeration of the names of the available curves.
     * 
     * @return an enumeration of the names of the available curves.
     */
    public static Enumeration getNames() {
        return X962NamedCurves.getNames();
    }
}
